Conceptual study of various derivatives of 805 1 micro controller such as RD, OTP,AYR containing PWM, RTC timer, EEPROM in system programming,Microprocessor supervisory control and architecture of PIC microcontroller

Five practicals out of first 6, Any three practicals from practical no 7, 8, 9 & 10

1)Plot the characteristics of Pressure transducer (Strain Gauge/Any pressure sensor)&Temperature Transducer (Thermocouple, RTD, Thermistors) Check it with suitableapplications .Do the confirmation of specifications according to the data sheet.

Part A:Design a second order LPF with cut off frequency fo=3.4 KHz for thefollowing configuration:

1. Unity gain Sallen & Key configuration with Q=2.

2. Q=0.707 for Butter worthLPF.

3. KRC filter with gain =5 and using equal components.

Part B:Investigate the effect of 1% variation of each component in the program ofany 2 of the above circuit.

Part C:Use any simulation software like p-SPICE to visualize the frequencyresponse.Part D:Comment on-

i. Cascading of filters for 3rd

and 4th

order.

ii. Other types responses like Chebyshev, Cauer.

High Pass Filter:

Part A:Design a second order HPF with cut off frequency fO= 100 Hz. For the

following configurations:

i. Unity gain Sallen Key Configuration with Q=2.

ii. Q=0.707 Butter Worth HPF.

iii. KRC filter with gain =5 and using equal components

Part B, C, and D: Similar as given in LPF with reference to HPF.

Band Pass Filter:

Part A:Design asecond order BPF with fO= IKHZ and BW = 100 Hz using equalComponent option. What is its resonance gain.Part B:Use PSPICE to visualizingthe frequency responsePart C:I Comment on Cascading of filter for 3rd

and 4th

order. II Other types responses likeChebyshev, Cauer.

Band Stop Filter / Notch Filter:

Part A:Design a Second order notch filter with fO= 60 Hz and BW= 5Hz. What isits low and High Frequency gain.

Part B:Use PSPICE to visualizing the frequency responsePart C:I Comment onCascading of filter for 3rd

and 4th

order. II Other types responses like Chebyshev,Cauer.

D) Micro controller Based Data Acquisition System:

Scope of assignments shall be-

a) Selection of Transducer for given specification

b) Front end analog signal conditioning circuit

c) Selection of suitable A to D converter

d) Selection of Microcontroller

e) Output interfacings: i) Relay

ii) Display (Single LED) iii) DAC with PWM for analog output

Dl. Temperature measurement systems:

Design data acquisition system to measure temperature between 20 C to 90 C withresolution of 1°C and accuracy of 0.5%. The DAS should provide an isolated 4-20mAanalog output using PWM-DAC combination. The system should also provide for230V / 5A potential free NO contact for each of HI and LO alarms. The set pointshould be variable Give software scheme for implementation in the form of flowchart

D2. Flow measurement system:

Design a flow measurement system using a ultrasonic flow sensor (transit time effect/ Doppler effect) either 'wetted' or 'clamp-on' type. The proposed system should beable to sense pressure up to _ _ _ bars with a maximum flow velocity of 10 m/s, witha temperature of liquid/slurry, not more than 200°C. Accuracy of 1% should be-achieved.

Design a Level measurement system for non-conducting liquid in a tank of 10m-height using capacitance probe. The level is to be controlled using a control valvesupplying the liquid in the tank. The level measured to be transmitted at a distance of200m and indicated on 3-!/2

digit LCD. The Microcontroller should generate a PWMsignal proportional to measure level and trigger alarms if level is less than 1m or morethan 9m. the alarm condition should be indicated on front panel by means of bar-graph. The bar-graph should also indicate measured level (on a 20 element bar-graph)

D4.Design a Microcontroller based weigh scale using load cell. The maximumweight that the machine can measure is 20Kg. Design signal conditioning system thatincludes calibration of machine • (full scale) and Tare weight (offset) adjustment.Microcontroller should be able to communicate data to a PC on RS 232C link andtransfer weight information on PC. The measured weight is also to be printed on local

printer. The weighing machine has a built-in LED display. Measurement accuracyrequired is within +/-

10 gm. Indicate software implementation in the form of flowchartD5.Designafour-channel tool displacement system for lathe machine tomeasure total displacement of 2cm with a resolution of 0.02mm i.e. 20(j.m. The tooldisplacement should be indicated on 3-'/2 digit LED display. The audible alarmshould be triggered when the set point is exceeded. Transmit displacement data onRS485 interface to a remote

location.

D6.Design an alarm annunciator for 4-channel pressure measurement system. Whenthe set point is exceeded, the audible alarm should be triggered. The display windowshould start flashing and continue flashing till ACK, push button is pressed. Thedisplay window is switched OFF. When alarm condition vanishes. A Test button is

provided with annunciator to check all display windows simultaneously.

(NOTE: Design should be based, on Analog / Digital Circuit only and not on Micro

1. The circuit for mini-project will be part of design done in Electronic Design Workshop or System Design in Semester I and II respectively.

2. The circuit should be simulated using any of the standard simulation softwareavailable.

3. Result verification for paper design and simulation should be carried out anddiscrepancies should discussed.

4. Verified circuit should be assembledand tested on general purpose PCB /Protoboard for actual working and practical results.

5. Layout of circuit using any std. Layout tool (Oread, Protel, CAD star, Pads,Ultiboard) should be design and PCB making process should be carried out.

6. Assembling and testing of circuit on PCB. This stage should consist of preparingbill of materials.

7. Design and fabrication of suitable enclosure with provision for externalinterfacing and power supply (wooden/plastic enclosure should not be used)

8. Testing of the circuit.

9 Preparation of project report to cover the project work and the details of work,which includes layouts, circuits, bill of material and relevant details. A binded(preference spiral) should be submitted to College. SMPS Design using free NationalSemiconductor tool.